Your boss asks you to calculate the flow through a natural gas pipeline. Since it is 26 inches inner diameter, it is impossible to run the gas through any kind of meter or measuring device. You decide to add 100 lb of CO2 per minute to the gas through a small ½ in. piece of pipe, collect samples of the gas downstream, and analyze them for CO2. Several consecutive samples after 1 hour are: 1hr, 0 min: 2.0 % CO2 1hr, 10 min: 2.2 % CO2 1 hr 20 min: 1.9 % CO2 1 hr 30 min: 2.1 % CO2 1 hr 40 min: 2.0 % CO2 a) Calculate the flow of gas in pounds per minute at the point of injection if the gas upstream of the point of injection is 100% CH4. b) Unfortunately for you, the gas upstream of the point of injection of CO2 already contained 1.0 % CO2. How much was your original flow estimate in error (in percent).